/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     The Pampered Chef - Adapted for month calendar
 *******************************************************************************/

package org.eclipse.swt.nebula.widgets.compositetable.month.internal;

import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.accessibility.ACC;
import org.eclipse.swt.accessibility.Accessible;
import org.eclipse.swt.accessibility.AccessibleAdapter;
import org.eclipse.swt.accessibility.AccessibleControlAdapter;
import org.eclipse.swt.accessibility.AccessibleControlEvent;
import org.eclipse.swt.accessibility.AccessibleEvent;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.nebula.widgets.compositetable.day.ICalendarableItemControl;
import org.eclipse.swt.nebula.widgets.compositetable.timeeditor.CalendarableItem;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;

/**
 * @since 3.2
 */
public class MonthCalendarableItemControl extends Canvas 
	implements ICalendarableItemControl 
{
//	private CLabel label;
	
	/** Gap between icon and text */
	private static final int GAP = 5;
	/** Left and right margins */
	private static final int INDENT = 3;
	/** a string inserted in the middle of text that has been shortened */
	private static final String ELLIPSIS = "..."; //$NON-NLS-1$ // could use the ellipsis glyph on some platforms "\u2026"
	/** the alignment. Either CENTER, RIGHT, LEFT. Default is LEFT*/
	private int align = SWT.LEFT;
	private int hIndent = INDENT;
	private int vIndent = INDENT;
	/** the current text */
	private String text;
	/** the current icon */
	private Image image;
	// The tooltip is used for two purposes - the application can set
	// a tooltip or the tooltip can be used to display the full text when the
	// the text has been truncated due to the label being too short.
	// The appToolTip stores the tooltip set by the application.  Control.tooltiptext 
	// contains whatever tooltip is currently being displayed.
	private String appToolTipText;
	
	private Image backgroundImage;
	private Color[] gradientColors;
	private int[] gradientPercents;
	private boolean gradientVertical;
	private Color background;
	
	private static int DRAW_FLAGS = SWT.DRAW_MNEMONIC | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT | SWT.DRAW_DELIMITER;
	
	/**
	 * @param parent
	 * @param style
	 */
	public MonthCalendarableItemControl(Composite parent, int style) {
		super(parent, checkStyle(style));
		if ((style & (SWT.CENTER | SWT.RIGHT)) == 0) style |= SWT.LEFT;
		if ((style & SWT.CENTER) != 0) align = SWT.CENTER;
		if ((style & SWT.RIGHT) != 0)  align = SWT.RIGHT;
		if ((style & SWT.LEFT) != 0)   align = SWT.LEFT;
		
		addPaintListener(new PaintListener(){
			public void paintControl(PaintEvent event) {
				onPaint(event);
			}
		});
		
		addDisposeListener(new DisposeListener(){
			public void widgetDisposed(DisposeEvent event) {
				onDispose(event);
			}
		});

		initAccessible();
		
		setBackground(parent.getBackground());
	}
	
	private CalendarableItem calendarableItem = null;

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#getCalendarableItem()
	 */
	public CalendarableItem getCalendarableItem() {
		return calendarableItem;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setCalendarableItem(org.eclipse.jface.examples.databinding.compositetable.timeeditor.CalendarableItem)
	 */
	public void setCalendarableItem(CalendarableItem calendarable) {
		this.calendarableItem = calendarable;
	}

	private int clipping = 0;

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#getClipping()
	 */
	public int getClipping() {
		return clipping;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setClipping(int)
	 */
	public void setClipping(int clipping) {
		this.clipping = clipping;
	}
	
	private int continued = 0;

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#getContinued()
	 */
	public int getContinued() {
		return continued;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setContinued(int)
	 */
	public void setContinued(int continued) {
		this.continued = continued;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setSelected(boolean)
	 */
	public void setSelected(boolean selected) {
		// noop
		// We currently don't allow an item to be selected.
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setImage(org.eclipse.swt.graphics.Image)
	 */
//	public void setImage(Image image) {
//		label.setImage(image);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.jface.examples.databinding.compositetable.day.internal.ICalendarableItemControl#setText(java.lang.String)
	 */
//	public void setText(String text) {
//		label.setText(text);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.swt.widgets.Control#setMenu(org.eclipse.swt.widgets.Menu)
	 */
//	public void setMenu(Menu menu) {
//		super.setMenu(menu);
//		label.setMenu(menu);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.swt.widgets.Control#setToolTipText(java.lang.String)
	 */
//	public void setToolTipText(String string) {
//		super.setToolTipText(string);
//		label.setToolTipText(string);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.swt.widgets.Control#addMouseListener(org.eclipse.swt.events.MouseListener)
	 */
//	public void addMouseListener(MouseListener listener) {
//		super.addMouseListener(listener);
//		label.addMouseListener(listener);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.swt.widgets.Control#removeMouseListener(org.eclipse.swt.events.MouseListener)
	 */
//	public void removeMouseListener(MouseListener listener) {
//		super.removeMouseListener(listener);
//		label.removeMouseListener(listener);
//	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.swt.widgets.Control#setBackground(org.eclipse.swt.graphics.Color)
	 */
//	public void setBackground(Color color) {
//		super.setBackground(color);
//		label.setBackground(color);
//	}

	/**
	 * Check the style bits to ensure that no invalid styles are applied.
	 */
	private static int checkStyle (int style) {
		if ((style & SWT.BORDER) != 0) style |= SWT.SHADOW_IN;
		int mask = SWT.SHADOW_IN | SWT.SHADOW_OUT | SWT.SHADOW_NONE | SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
		style = style & mask;
		return style |= SWT.NO_FOCUS | SWT.DOUBLE_BUFFERED;
	}

//	protected void checkSubclass () {
//		String name = getClass().getName ();
//		String validName = CLabel.class.getName();
//		if (!validName.equals(name)) {
//			SWT.error (SWT.ERROR_INVALID_SUBCLASS);
//		}
//	}

	public Point computeSize(int wHint, int hHint, boolean changed) {
		checkWidget();
		Point e = getTotalSize(image, text);
		if (wHint == SWT.DEFAULT){
			e.x += 2*hIndent;
		} else {
			e.x = wHint;
		}
		if (hHint == SWT.DEFAULT) {
			e.y += 2*vIndent;
		} else {
			e.y = hHint;
		}
		return e;
	}
	/**
	 * Draw a rectangle in the given colors.
	 */
	private void drawBevelRect(GC gc, int x, int y, int w, int h, Color topleft, Color bottomright) {
		gc.setForeground(bottomright);
		gc.drawLine(x+w, y,   x+w, y+h);
		gc.drawLine(x,   y+h, x+w, y+h);
		
		gc.setForeground(topleft);
		gc.drawLine(x, y, x+w-1, y);
		gc.drawLine(x, y, x,     y+h-1);
	}
	/*
	 * Return the lowercase of the first non-'&' character following
	 * an '&' character in the given string. If there are no '&'
	 * characters in the given string, return '\0'.
	 */
	char _findMnemonic (String string) {
		if (string == null) return '\0';
		int index = 0;
		int length = string.length ();
		do {
			while (index < length && string.charAt (index) != '&') index++;
			if (++index >= length) return '\0';
			if (string.charAt (index) != '&') return Character.toLowerCase (string.charAt (index));
			index++;
		} while (index < length);
	 	return '\0';
	}
	/**
	 * Returns the alignment.
	 * The alignment style (LEFT, CENTER or RIGHT) is returned.
	 * 
	 * @return SWT.LEFT, SWT.RIGHT or SWT.CENTER
	 */
	public int getAlignment() {
		//checkWidget();
		return align;
	}
	/**
	 * Return the CLabel's image or <code>null</code>.
	 * 
	 * @return the image of the label or null
	 */
	public Image getImage() {
		//checkWidget();
		return image;
	}
	/**
	 * Compute the minimum size.
	 */
	private Point getTotalSize(Image image, String text) {
		Point size = new Point(0, 0);

		if (image != null) {
			Rectangle r = image.getBounds();
			size.x += r.width;
			size.y += r.height;
		}
			
		GC gc = new GC(this);
		if (text != null && text.length() > 0) {
			Point e = gc.textExtent(text, DRAW_FLAGS);
			size.x += e.x;
			size.y = Math.max(size.y, e.y);
			if (image != null) size.x += GAP;
		} else {
			size.y = Math.max(size.y, gc.getFontMetrics().getHeight());
		}
		gc.dispose();
		
		return size;
	}
	public int getStyle () {
		int style = super.getStyle();
		switch (align) {
			case SWT.RIGHT: style |= SWT.RIGHT; break;
			case SWT.CENTER: style |= SWT.CENTER; break;
			case SWT.LEFT: style |= SWT.LEFT; break;
		}
		return style;
	}

	/**
	 * Return the Label's text.
	 * 
	 * @return the text of the label or null
	 */
	public String getText() {
		//checkWidget();
		return text;
	}
	public String getToolTipText () {
		checkWidget();
		return appToolTipText;
	}
	private void initAccessible() {
		Accessible accessible = getAccessible();
		accessible.addAccessibleListener(new AccessibleAdapter() {
			public void getName(AccessibleEvent e) {
				e.result = getText();
			}
			
			public void getHelp(AccessibleEvent e) {
				e.result = getToolTipText();
			}
			
			public void getKeyboardShortcut(AccessibleEvent e) {
				char mnemonic = _findMnemonic(MonthCalendarableItemControl.this.text);	
				if (mnemonic != '\0') {
					e.result = "Alt+"+mnemonic; //$NON-NLS-1$
				}
			}
		});
			
		accessible.addAccessibleControlListener(new AccessibleControlAdapter() {
			public void getChildAtPoint(AccessibleControlEvent e) {
				e.childID = ACC.CHILDID_SELF;
			}
			
			public void getLocation(AccessibleControlEvent e) {
				Rectangle rect = getDisplay().map(getParent(), null, getBounds());
				e.x = rect.x;
				e.y = rect.y;
				e.width = rect.width;
				e.height = rect.height;
			}
			
			public void getChildCount(AccessibleControlEvent e) {
				e.detail = 0;
			}
			
			public void getRole(AccessibleControlEvent e) {
				e.detail = ACC.ROLE_LABEL;
			}
			
			public void getState(AccessibleControlEvent e) {
				e.detail = ACC.STATE_READONLY;
			}
		});
	}
	void onDispose(DisposeEvent event) {
		gradientColors = null;
		gradientPercents = null;
		backgroundImage = null;
		text = null;
		image = null;
		appToolTipText = null;
	}

	void onPaint(PaintEvent event) {
		Rectangle rect = getClientArea();
		if (rect.width == 0 || rect.height == 0) return;
		
		boolean shortenText = false;
		String t = text;
		Image img = image;
		int availableWidth = Math.max(0, rect.width - 2*hIndent);
		Point extent = getTotalSize(img, t);
		if (extent.x > availableWidth) {
			img = null;
			extent = getTotalSize(img, t);
			if (extent.x > availableWidth) {
				shortenText = true;
			}
		}
		
		GC gc = event.gc;
		String[] lines = text == null ? null : splitString(text); 
		
		// shorten the text
		if (shortenText) {
			extent.x = 0;
		    for(int i = 0; i < lines.length; i++) {
		    	Point e = gc.textExtent(lines[i], DRAW_FLAGS);
		    	if (e.x > availableWidth) {
		    		lines[i] = shortenText(gc, lines[i], availableWidth);
		    		extent.x = Math.max(extent.x, getTotalSize(null, lines[i]).x);
		    	} else {
		    		extent.x = Math.max(extent.x, e.x);
		    	}
		    }
			if (appToolTipText == null) {
				super.setToolTipText(text);
			}
		} else {
			super.setToolTipText(appToolTipText);
		}
			
		// determine horizontal position
		int x = rect.x + hIndent;
		if (align == SWT.CENTER) {
			x = (rect.width - extent.x)/2;
		}
		if (align == SWT.RIGHT) {
			x = rect.width - hIndent - extent.x;
		}
		
		// draw a background image behind the text
		try {
			if (backgroundImage != null) {
				// draw a background image behind the text
				Rectangle imageRect = backgroundImage.getBounds();
				// tile image to fill space
				gc.setBackground(getBackground());
				gc.fillRectangle(rect);
				int xPos = 0;
				while (xPos < rect.width) {
					int yPos = 0;
					while (yPos < rect.height) {
						gc.drawImage(backgroundImage, xPos, yPos);
						yPos += imageRect.height;
					}
					xPos += imageRect.width;
				}
			} else if (gradientColors != null) {
				// draw a gradient behind the text
				final Color oldBackground = gc.getBackground();
				if (gradientColors.length == 1) {
					if (gradientColors[0] != null) gc.setBackground(gradientColors[0]);
					gc.fillRectangle(0, 0, rect.width, rect.height);
				} else {
					final Color oldForeground = gc.getForeground();
					Color lastColor = gradientColors[0];
					if (lastColor == null) lastColor = oldBackground;
					int pos = 0;
					for (int i = 0; i < gradientPercents.length; ++i) {
						gc.setForeground(lastColor);
						lastColor = gradientColors[i + 1];
						if (lastColor == null) lastColor = oldBackground;
						gc.setBackground(lastColor);
						if (gradientVertical) {
							final int gradientHeight = (gradientPercents[i] * rect.height / 100) - pos;
							gc.fillGradientRectangle(0, pos, rect.width, gradientHeight, true);
							pos += gradientHeight;
						} else {
							final int gradientWidth = (gradientPercents[i] * rect.width / 100) - pos;
							gc.fillGradientRectangle(pos, 0, gradientWidth, rect.height, false);
							pos += gradientWidth;
						}
					}
					if (gradientVertical && pos < rect.height) {
						gc.setBackground(getBackground());
						gc.fillRectangle(0, pos, rect.width, rect.height - pos);
					}
					if (!gradientVertical && pos < rect.width) {
						gc.setBackground(getBackground());
						gc.fillRectangle(pos, 0, rect.width - pos, rect.height);
					}
					gc.setForeground(oldForeground);
				}
				gc.setBackground(oldBackground);
			} else {
				if (background != null || (getStyle() & SWT.DOUBLE_BUFFERED) == 0) {
					gc.setBackground(getBackground());
					gc.fillRectangle(rect);
				}
			}
		} catch (SWTException e) {
			if ((getStyle() & SWT.DOUBLE_BUFFERED) == 0) {
				gc.setBackground(getBackground());
				gc.fillRectangle(rect);
			}
		}

		// draw border
		int style = getStyle();
		if ((style & SWT.SHADOW_IN) != 0 || (style & SWT.SHADOW_OUT) != 0) {
			paintBorder(gc, rect);
		}

		// draw the image
		if (img != null) {
			Rectangle imageRect = img.getBounds();
			gc.drawImage(img, 0, 0, imageRect.width, imageRect.height, 
			                x, (rect.height-imageRect.height)/2, imageRect.width, imageRect.height);
			x +=  imageRect.width + GAP;
			extent.x -= imageRect.width + GAP;
		}
		// draw the text
		if (lines != null) {
			int lineHeight = gc.getFontMetrics().getHeight();
			int textHeight = lines.length * lineHeight;
			int lineY = Math.max(vIndent, rect.y + (rect.height - textHeight) / 2);
			gc.setForeground(getForeground());
			for (int i = 0; i < lines.length; i++) {
				int lineX = x;
				if (lines.length > 1) {
					if (align == SWT.CENTER) {
						int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x;
						lineX = x + Math.max(0, (extent.x - lineWidth) / 2);
					}
					if (align == SWT.RIGHT) {
						int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x;
						lineX = Math.max(x, rect.x + rect.width - hIndent - lineWidth);
					}
				}
				gc.drawText(lines[i], lineX, lineY, DRAW_FLAGS);
				lineY += lineHeight;
			}
		}
	}
	/**
	 * Paint the Label's border.
	 */
	private void paintBorder(GC gc, Rectangle r) {
		Display disp= getDisplay();

		Color c1 = null;
		Color c2 = null;
		
		int style = getStyle();
		if ((style & SWT.SHADOW_IN) != 0) {
			c1 = disp.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
			c2 = disp.getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW);
		}
		if ((style & SWT.SHADOW_OUT) != 0) {		
			c1 = disp.getSystemColor(SWT.COLOR_WIDGET_LIGHT_SHADOW);
			c2 = disp.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
		}
			
		if (c1 != null && c2 != null) {
			gc.setLineWidth(1);
			drawBevelRect(gc, r.x, r.y, r.width-1, r.height-1, c1, c2);
		}
	}
	/**
	 * Set the alignment of the CLabel.
	 * Use the values LEFT, CENTER and RIGHT to align image and text within the available space.
	 * 
	 * @param align the alignment style of LEFT, RIGHT or CENTER
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 *    <li>ERROR_INVALID_ARGUMENT - if the value of align is not one of SWT.LEFT, SWT.RIGHT or SWT.CENTER</li>
	 * </ul>
	 */
	public void setAlignment(int align) {
		checkWidget();
		if (align != SWT.LEFT && align != SWT.RIGHT && align != SWT.CENTER) {
			SWT.error(SWT.ERROR_INVALID_ARGUMENT);
		}
		if (this.align != align) {
			this.align = align;
			redraw();
		}
	}

	public void setBackground (Color color) {
		super.setBackground (color);
		// Are these settings the same as before?
		if (backgroundImage == null && 
			gradientColors == null && 
			gradientPercents == null) {
			if (color == null) {
				if (background == null) return;
			} else {
				if (color.equals(background)) return;
			}		
		}
		background = color;
		backgroundImage = null;
		gradientColors = null;
		gradientPercents = null;
		redraw ();
	}

	/**
	 * Specify a gradient of colours to be drawn in the background of the CLabel.
	 * <p>For example, to draw a gradient that varies from dark blue to blue and then to
	 * white and stays white for the right half of the label, use the following call 
	 * to setBackground:</p>
	 * <pre>
	 *	clabel.setBackground(new Color[]{display.getSystemColor(SWT.COLOR_DARK_BLUE), 
	 *		                           display.getSystemColor(SWT.COLOR_BLUE),
	 *		                           display.getSystemColor(SWT.COLOR_WHITE), 
	 *		                           display.getSystemColor(SWT.COLOR_WHITE)},
	 *		               new int[] {25, 50, 100});
	 * </pre>
	 *
	 * @param colors an array of Color that specifies the colors to appear in the gradient 
	 *               in order of appearance from left to right;  The value <code>null</code> 
	 *               clears the background gradient; the value <code>null</code> can be used 
	 *               inside the array of Color to specify the background color.
	 * @param percents an array of integers between 0 and 100 specifying the percent of the width 
	 *                 of the widget at which the color should change; the size of the percents 
	 *                 array must be one less than the size of the colors array.
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 *    <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li>
	 * </ul>
	 */
	public void setBackground(Color[] colors, int[] percents) {
		setBackground(colors, percents, false);
	}
	/**
	 * Specify a gradient of colours to be drawn in the background of the CLabel.
	 * <p>For example, to draw a gradient that varies from dark blue to white in the vertical,
	 * direction use the following call 
	 * to setBackground:</p>
	 * <pre>
	 *	clabel.setBackground(new Color[]{display.getSystemColor(SWT.COLOR_DARK_BLUE), 
	 *		                           display.getSystemColor(SWT.COLOR_WHITE)},
	 *		                 new int[] {100}, true);
	 * </pre>
	 *
	 * @param colors an array of Color that specifies the colors to appear in the gradient 
	 *               in order of appearance from left/top to right/bottom;  The value <code>null</code> 
	 *               clears the background gradient; the value <code>null</code> can be used 
	 *               inside the array of Color to specify the background color.
	 * @param percents an array of integers between 0 and 100 specifying the percent of the width/height 
	 *                 of the widget at which the color should change; the size of the percents 
	 *                 array must be one less than the size of the colors array.
	 * @param vertical indicate the direction of the gradient.  True is vertical and false is horizontal.
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 *    <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li>
	 * </ul>
	 * 
	 * @since 3.0
	 */
	public void setBackground(Color[] colors, int[] percents, boolean vertical) {	
		checkWidget();
		if (colors != null) {
			if (percents == null || percents.length != colors.length - 1) {
				SWT.error(SWT.ERROR_INVALID_ARGUMENT);
			}
			if (getDisplay().getDepth() < 15) {
				// Don't use gradients on low color displays
				colors = new Color[] {colors[colors.length - 1]};
				percents = new int[] { };
			}
			for (int i = 0; i < percents.length; i++) {
				if (percents[i] < 0 || percents[i] > 100) {
					SWT.error(SWT.ERROR_INVALID_ARGUMENT);
				}
				if (i > 0 && percents[i] < percents[i-1]) {
					SWT.error(SWT.ERROR_INVALID_ARGUMENT);
				}
			}
		}
		
		// Are these settings the same as before?
		final Color background = getBackground();
		if (backgroundImage == null) {
			if ((gradientColors != null) && (colors != null) && 
				(gradientColors.length == colors.length)) {
				boolean same = false;
				for (int i = 0; i < gradientColors.length; i++) {
					same = (gradientColors[i] == colors[i]) ||
						((gradientColors[i] == null) && (colors[i] == background)) ||
						((gradientColors[i] == background) && (colors[i] == null));
					if (!same) break;
				}
				if (same) {
					for (int i = 0; i < gradientPercents.length; i++) {
						same = gradientPercents[i] == percents[i];
						if (!same) break;
					}
				}
				if (same && this.gradientVertical == vertical) return;
			}
		} else {
			backgroundImage = null;
		}
		// Store the new settings
		if (colors == null) {
			gradientColors = null;
			gradientPercents = null;
			gradientVertical = false;
		} else {
			gradientColors = new Color[colors.length];
			for (int i = 0; i < colors.length; ++i)
				gradientColors[i] = (colors[i] != null) ? colors[i] : background;
			gradientPercents = new int[percents.length];
			for (int i = 0; i < percents.length; ++i)
				gradientPercents[i] = percents[i];
			gradientVertical = vertical;
		}
		// Refresh with the new settings
		redraw();
	}
	/**
	 * Set the image to be drawn in the background of the label.
	 * 
	 * @param image the image to be drawn in the background
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setBackground(Image image) {
		checkWidget();
		if (image == backgroundImage) return;
		if (image != null) {
			gradientColors = null;
			gradientPercents = null;
		}
		backgroundImage = image;
		redraw();
		
	}
	public void setFont(Font font) {
		super.setFont(font);
		redraw();
	}
	/**
	 * Set the label's Image.
	 * The value <code>null</code> clears it.
	 * 
	 * @param image the image to be displayed in the label or null
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setImage(Image image) {
		checkWidget();
		if (image != this.image) {
			this.image = image;
			redraw();
		}
	}
	/**
	 * Set the label's text.
	 * The value <code>null</code> clears it.
	 * 
	 * @param text the text to be displayed in the label or null
	 * 
	 * @exception SWTException <ul>
	 *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
	 *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
	 * </ul>
	 */
	public void setText(String text) {
		checkWidget();
		if (text == null) text = ""; //$NON-NLS-1$
		if (! text.equals(this.text)) {
			this.text = text;
			redraw();
		}
	}
	public void setToolTipText (String string) {
		super.setToolTipText (string);
		appToolTipText = super.getToolTipText();
	}
	/**
	 * Shorten the given text <code>t</code> so that its length doesn't exceed
	 * the given width. The default implementation replaces characters in the
	 * center of the original string with an ellipsis ("...").
	 * Override if you need a different strategy.
	 * 
	 * @param gc the gc to use for text measurement
	 * @param t the text to shorten
	 * @param width the width to shorten the text to, in pixels
	 * @return the shortened text
	 */
	protected String shortenText(GC gc, String t, int width) {
		if (t == null) return null;
		int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x;
		int l = t.length();
		int s = l;
		while (s >= 0) {
			String s1 = t.substring(0, s);
			int l1 = gc.textExtent(s1, DRAW_FLAGS).x;
			if (l1+w < width) {
				t = s1 + ELLIPSIS;
				break;
			}
			s--;
		}
		return t;
	}

	private String[] splitString(String text) {
	    String[] lines = new String[1];
	    int start = 0, pos;
	    do {
	        pos = text.indexOf('\n', start);
	        if (pos == -1) {
	        	lines[lines.length - 1] = text.substring(start);
	        } else {
	            boolean crlf = (pos > 0) && (text.charAt(pos - 1) == '\r');
	            lines[lines.length - 1] = text.substring(start, pos - (crlf ? 1 : 0));
	            start = pos + 1;
	            String[] newLines = new String[lines.length+1];
	            System.arraycopy(lines, 0, newLines, 0, lines.length);
	       		lines = newLines;
	        }
	    } while (pos != -1);
	    return lines;
	}

}
